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1. [Amps] Re: Chimneys for 3-400 4-400 (score: 1): Author: zl1aih@ihug.co.nz (zl1aih@ihug.co.nz); Date: Wed, 4 Dec 2002 21:35:47 +1300; The Coleman lantern #4 chimney (NZ$5.20 in 1990) fits the 3 X 4-400 chassis that I was given by Barry ZL1DD - seems it was salvaged from a Danish MF transmitter that ran 24/7/365 on 500kHz (stand-by; /archives//html/Amps/2002-12/msg00056.html (7,732 bytes)
2. [AMPS] HA-10 Conversion to 572B Tubes (score: 1): Author: zl1aih@ihug.co.nz (zl1aih@ihug.co.nz); Date: Fri, 22 Feb 2002 14:25:29 +1300; Hi Bill I have restored a Heath HA-10 - it had been so severely modified and subsequently neglected, I had to completely strip it back to a box of components, nuts and bolts etc. Luckily, I was given; /archives//html/Amps/2002-02/msg00221.html (8,292 bytes)
3. [AMPS] Coil Forms (score: 1): Author: zl1aih@ihug.co.nz (zl1aih@ihug.co.nz); Date: Fri, 7 Dec 2001 21:35:24 +1300; 73 Peter G3RZP> Yes, there are still quite a few here in ZL. My next project (which should keep me out of mischief for a year or two) is a separate amplifier for each HF band for CW contesting. (the; /archives//html/Amps/2001-12/msg00157.html (8,332 bytes)
4. [AMPS] Bandswitch parts? (score: 1): Author: zl1aih@ihug.co.nz (zl1aih@ihug.co.nz); Date: Tue, 13 Nov 2001 22:40:29 +1300; Agreed, but mount the switches on RF rated plastic plate. I've seen these switches fail when mounted to metal panels or brackets at only 2.5kv. The indexing is so heavy-duty that you should disable t; /archives//html/Amps/2001-11/msg00222.html (7,979 bytes)
5. [Amps] Re: 203-A Tube (score: 1): Author: zl1aih@ihug.co.nz; Date: Mon, 29 Dec 2003 06:29:22 +1300; 203-A Triode Nominal output 100 watts Fil 10 volts, 3.25 amps Plate 1250 volts, 0.175 amps Grid bias -100 volts Grid current 60 mA Safe dissipation 100 watts Amp factor 25 Ken ZL1AIH _______________; /archives//html/Amps/2003-12/msg00425.html (6,445 bytes)
6. [Amps] Re: Eimac 5-500A (score: 1): Author: zl1aih@ihug.co.nz; Date: Sun, 29 Feb 2004 11:10:24 +1300; After several hours searching, I've been unable to find any reference to the Eimac 5-500A, other than learning that a very large Henry amp used one as a driver. Anyone on the list have any data? 73,; /archives//html/Amps/2004-02/msg00301.html (6,786 bytes)
7. [Amps] Re: Glass windows (score: 1): Author: zl1aih@ihug.co.nz; Date: Mon, 01 Mar 2004 15:21:03 +1300; Can't remember where, but I have seen a picture of a home-brew amp that used the glass from a junked microwave oven - in fact I planned to use one on a single-band amp project (since abandoned) - the; /archives//html/Amps/2004-03/msg00000.html (6,457 bytes)
8. [Amps] Re: unknown tube amp (score: 1): Author: zl1aih@ihug.co.nz; Date: Mon, 13 Dec 2004 13:31:45 +1300; How about a pair of 810s? 73, Ken ZL1AIH _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2004-12/msg00201.html (6,210 bytes)
9. [Amps] Re: hi C out (score: 1): Author: zl1aih@ihug.co.nz; Date: Sat, 22 Jan 2005 20:53:50 +1300; Hi Mike, Yes, I still have the HR with W4MB's article and your memory is correct. It's a 'must read' for newbie amp home-brewers with limited budgets. However, it should be read in conjunction with R; /archives//html/Amps/2005-01/msg00446.html (7,345 bytes)
10. [Amps] Re: Why price difference/TCO (score: 1): Author: zl1aih@ihug.co.nz; Date: Sat, 05 Feb 2005 14:21:16 +1300; Glenmorangie US$100 a bottle? My son-in-law gave me a bottle (duty-free). Next time, I'll try to make it last a lot longer. 73, Ken ZL1AIH _______________________________________________ Amps mailing; /archives//html/Amps/2005-02/msg00131.html (6,338 bytes)
11. Re: [Amps] how to read antenna R + jX ?? (score: 1): Author: zl1aih@ihug.co.nz; Date: Sun, 27 Feb 2005 16:29:29 +1300; Hi All, I have an Autek RF-1 and have had no difficulty with determining the sign of j - just follow the instructions and note Z at the frequency of interest - then increase frequency by a small amou; /archives//html/Amps/2005-02/msg00877.html (7,237 bytes)
12. Re: [Amps] Co-ax adaptor (score: 1): Author: zl1aih@ihug.co.nz; Date: Sat, 23 Apr 2005 11:16:36 +1200; The antenna socket on my JRC transmitter is marked UG- 352A/U. I need an adaptor to convert to N or UHF - any advice will be much appreciated. 73, Ken ZL1AIH _________________________________________; /archives//html/Amps/2005-04/msg00459.html (6,336 bytes)
13. Re: [Amps] Plate Choke (score: 1): Author: zl1aih@ihug.co.nz; Date: Fri, 26 Aug 2005 17:52:31 +1200; Alex said - ". Another forgotten solution is to place the feed choke at the 50 ohms end of the pi network. With 50 ohms in parallel the Q is lowered so much as to become insignificant and the frequen; /archives//html/Amps/2005-08/msg00687.html (8,318 bytes)
14. Re: [Amps] Blower ratings (score: 1): Author: zl1aih@ihug.co.nz; Date: Sun, 25 Sep 2005 10:00:27 +1200; I have a Crompton Parkinson blower type VHMC142A 1600F - 2500 rpm. After searching dozens of Crompton Parkinson sites via Google, I could find no reference at all to blowers. The outlet port is 2 1/2; /archives//html/Amps/2005-09/msg00319.html (6,272 bytes)
15. Re: [Amps] MEK (score: 1): Author: zl1aih@ihug.co.nz; Date: Fri, 17 Mar 2006 21:13:30 +1300; Hi all, MEK was (perhaps is still used) as a solvent/thinner for epoxy resin in boat building/repairs. Though never seeing any warning about inhalation, eye protection was stressed. Any splash requir; /archives//html/Amps/2006-03/msg00482.html (6,327 bytes)
16. Re: [Amps] SB220 conversion (score: 1): Author: zl1aih@ihug.co.nz; Date: Sun, 07 May 2006 08:49:10 +1200; Hi all - Baz, ZL1DD asked me to post the following :- Bit pushed for time this morning so sorry if answer a bit vague. Just Google GS-35 and see what happens. There are a number of guys selling and s; /archives//html/Amps/2006-05/msg00025.html (8,982 bytes)
17. Re: [Amps] One GS-35B? (score: 1): Author: zl1aih@ihug.co.nz; Date: Wed, 17 May 2006 19:55:44 +1200; Hi Tony, Truly wisdom, indeed. Mothers-in-law in separate countries, too. 73, Ken ZL1AIH My favorite saying is this: Tubes are like women... If you feel that you must have two, keep them in separate; /archives//html/Amps/2006-05/msg00177.html (6,469 bytes)
18. Re: [Amps] Sunair GSL-1900A amp (score: 1): Author: zl1aih@ihug.co.nz; Date: Thu, 29 Jun 2006 18:32:03 +1200; Hi All, I saw a review of the GSL-1900A amplifier on eham, and I have that amp in my shack, plus full manual. Because I want to use a different transceiver as the exciter, I'm trying to configure the; /archives//html/Amps/2006-06/msg00615.html (6,429 bytes)
19. Re: [Amps] Broadband noise (score: 1): Author: zl1aih@ihug.co.nz; Date: Tue, 04 Jul 2006 10:29:56 +1200; Vic K2VCO wrote :- modern transceivers. On our annual field day my club operates a CW and an SSB station. We use switched bandpass filters on both rigs and do our best to site antennas to reduce coup; /archives//html/Amps/2006-07/msg00147.html (7,964 bytes)
20. Re: [Amps] Heathkit HA10 linear (score: 1): Author: zl1aih@ihug.co.nz; Date: Sat, 05 Aug 2006 20:12:11 +1200; Hi Tom, Unless the HA-10 has been modified to use four 572-Bs and the 3000 volt transformer is located outside the cabinet, and the 3B28s have been replaced with appropriate HV diode strings, and the; /archives//html/Amps/2006-08/msg00174.html (7,729 bytes)

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